Note - Blast analyses are based on comparisons of the phosphosites and the bordering four amino acids on each side of these phosphosites.

Phosphosite
Human Protein:	MARCH-X
Human P-Site:	S499
P-Site Sequence:	SSTSVHSSDSEGNSG
UniProt:	Q8NA82
Intern. Prot. ID:

Protein Phosphosite Match	Human Protein Short Name	Human UniProt. ID	Phosphosite Number	Sequence	% Identity / # AA	Target Size kDa
Phosphosite 0:	MARCH-X	Q8NA82	S499	SSTSVHSSDSEGNSG	100 / 9 AA	91
Phosphosite 1:	CEP152	O94986	S495	AKLGIHPSDSEGELN	75 / 8 AA	189
Phosphosite 2:	MARCH-X	Q8NA82	S501	TSVHSSDSEGNSGFH	100 / 7 AA	91
Phosphosite 3:	RIZ	Q13029	S858	SVHKKHCSDSEGKEF	85 / 7 AA	189
Phosphosite 4:	CELSR2	Q9HCU4	S2740	SYASTHSSDSEEEEE	87 / 8 AA	317
Phosphosite 5:	CCDC38	Q502W7	S264	AKLSLHSSNKEGILE	66 / 9 AA	65
Phosphosite 6:	RIZ	Q13029	S860	HKKHCSDSEGKEFKE	85 / 7 AA	189
Phosphosite 7:	CEP152	O94986	S497	LGIHPSDSEGELNIE	85 / 7 AA	189
Phosphosite 8:	CREB3L2	Q70SY1	S212	TPPSSHGSDSEGSLS	77 / 9 AA	57
Phosphosite 9:	MYPN	Q86TC9	S364	YIEGVSSSDSEGDPN	87 / 8 AA	145
Phosphosite 10:	CREB3L2	Q70SY1	S214	PSSHGSDSEGSLSPN	85 / 7 AA	57
Phosphosite 11:	ITPR1	Q14643	S2694	RAMSLVSSDSEGEQN	77 / 9 AA	314
Phosphosite 12:	NUDT18	Q6ZVK8	S23	GQGSSVHSCDSAPAG	75 / 8 AA	35
Phosphosite 13:	PTPN14	Q15678	S708	ATMLIHSSESEEEEE	71 / 7 AA	135
Phosphosite 14:	IWS1	Q96ST2	S362	MDRKKFHSSDSEEEE	100 / 6 AA	92
Phosphosite 15:	Asxl3	Q9C0F0	S1203	TDLSVHSSDENIPVS	100 / 6 AA	242
Phosphosite 16:	ZNF428	Q96B54	S33	GPEHSSDSEYTLSEP	100 / 6 AA	20
Phosphosite 17:	CELSR1	Q9NYQ6	S2825	SSYASSHSSDSEDDG	87 / 8 AA	329
Phosphosite 18:	villin	P09327	S259	ALKLYHVSDSEGNLV	85 / 7 AA	93
Phosphosite 19:	SIX3	O95343	S326	SILSVTSSDSECDV_	87 / 8 AA	35
Phosphosite 20:	LYSMD1	Q96S90	S112	GEEKVHPSNSEVWPH	71 / 7 AA	25